# Sleep Ledger: Debt Tracker — Pay Off Sleep Debt Daily > Calculates sleep debt and provides a personalized recovery plan. (iPhone/iPad app by Takumi Kanzaki.) - Source: https://appshunter.io/ios/app/sleep-ledger-debt-tracker/id6759897307 (this page in markdown: same URL + `.md`) - Developer: [Takumi Kanzaki](https://appshunter.io/developer/1820952468) - Category: Health & Fitness, Lifestyle - Price: Free with in-app purchases - Rating: 5.00/5 from 2 App Store ratings - Age rating: 12+ - Requires: iOS 18.0 · 7 MB - Languages: American English, French (France), German (Germany), Japanese, Korean - Released: 2026-03-03 - Data updated: 2026-09-05 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/sleep-ledger-debt-tracker/id6759897307/reviews.md ## What is Sleep Ledger? Are you running on a sleep deficit? Sleep Ledger reads your Apple Health sleep data to calculate how much sleep you owe your body — and builds a personalized, day-by-day recovery plan to help you pay it back. WHAT MAKES SLEEP LEDGER DIFFERENT Unlike other sleep apps that drown you in data, Sleep Ledger gives you two things: a number (your sleep debt) and a plan (when to go to bed tonight). - Quality-Weighted Debt Score Not just hours — Sleep Ledger uses Apple Watch sleep stage data (Deep, REM, Core) to calculate how effective your sleep really was. Six hours of deep, restorative sleep counts differently than eight hours of restless tossing. - Calendar Recovery Plan See exactly when you'll be debt-free. Sleep Ledger generates a day-by-day schedule with recommended bedtimes, adjustable for late nights and per-weekday wake times. - Lock Screen, Home Screen & Apple Watch Complications Your debt balance and tonight's bedtime — always one glance away on your lock screen, home screen, or watch face, without opening the app. - Private by Design, On-Device Processing No account creation. No analytics SDKs. No advertising code. No third-party trackers. Your sleep, heart rate, and HRV data is processed entirely on your device. The only network request happens when you choose to send us feedback from Settings → Contact, and the diagnostic details are shown in the form before you send them. HOW IT WORKS 1. Download and grant read access to Apple Health sleep data. 2. Sleep Ledger analyzes your past 14 days of sleep history. 3. See your current sleep debt balance instantly. 4. Follow your personalized recovery plan to reach zero debt. FEATURES Free: - Sleep debt calculation (14-day rolling window) - Recommended bedtime based on your wake time and current debt - Manual sleep entry (add, edit, delete nights) - Lock Screen widgets (debt balance & recovery gauge) - Home Screen widget, Small (debt balance + days to zero) - Apple Watch complications (circular gauge, rectangular, corner) - Bedtime reminder and morning summary notifications - Siri Shortcuts (check debt, get bedtime, last night summary) - Works with or without Apple Watch (enhanced with Watch) - English, Japanese, German, French, and Korean Premium: - 14-day debt trend charts - Day-by-day recovery plan with target zero-debt date - Quality-weighted debt score (sleep stages + HRV) - Sleep stage breakdown (Deep / Core / REM stacked chart) - Home Screen widget, Medium (debt · last night · bedtime) - CSV data export (date, duration, stages, HR/HRV) ABOUT SLEEP DEBT Sleep debt is the gap between the sleep your body needs and the sleep you actually get. Research shows that accumulated sleep debt affects energy, mood, focus, and long-term health. The good news: you can pay it back. Sleep Ledger shows you how. PRICING Sleep Ledger is free to download. Core features — today's debt balance, tonight's bedtime recommendation, manual sleep entry, Lock Screen widgets, Apple Watch complications, and Small Home Screen widget — are always free. Premium unlocks the full recovery plan, sleep trend history, quality-weighted scoring, sleep stage breakdown, Home Screen Medium widget, and CSV data export. Annual plan includes a 2-week free trial. PRIVACY Sleep Ledger contains zero analytics SDKs, zero advertising code, and zero third-party trackers. Your sleep, heart rate, and HRV data is processed entirely on your device — it never leaves your iPhone. The only network request is triggered when you tap Settings → Contact to send feedback, and the full diagnostic payload (iOS version, device model, app version, HealthKit fetch status, Premium status) is visible in the form before you send it. We believe your health data belongs to you and only you. Note: Sleep Ledger is a general wellness app. It is not a medical device and is not intended to diagnose, treat, or prevent any disease. Consult a healthcare professional for medical concerns. ## Key features - Sleep debt calculation - Personalized recovery plan - Quality-weighted sleep score - Calendar-based schedule - Lock screen widgets - On-device processing - Siri Shortcuts ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Monthly | $4.99 | per month | | Annual | $29.99 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Lifetime | $79.99 | one-time | ## Frequently asked questions about Sleep Ledger ### How does Sleep Ledger calculate sleep debt? Sleep Ledger calculates sleep debt by analyzing your past 14 days of sleep history from Apple Health. It uses a quality-weighted score that considers sleep stages like Deep, REM, and Core, along with HRV data in the premium version, to determine the effectiveness of your sleep. ### What is the recovery plan in Sleep Ledger? The recovery plan is a personalized, day-by-day schedule generated by Sleep Ledger. It provides recommended bedtimes to help you pay back your accumulated sleep debt and reach zero debt by a target date, which is visible in the premium version. ### Can I see my sleep debt without opening Sleep Ledger? Yes, Sleep Ledger offers Lock Screen widgets, Home Screen widgets, and Apple Watch complications. These allow you to view your current sleep debt balance and tonight's recommended bedtime at a glance, without needing to open the app. ### Is my sleep data kept private with Sleep Ledger? Sleep Ledger is designed with privacy in mind, processing all sleep, heart rate, and HRV data entirely on your device. It does not require account creation, uses no analytics SDKs, and has no advertising or third-party trackers. ### What features are available for free in Sleep Ledger? The free version of Sleep Ledger includes sleep debt calculation with a 14-day rolling window, recommended bedtimes, manual sleep entry, Lock Screen widgets, Apple Watch complications, bedtime reminders, and Siri Shortcuts. ### What are the benefits of the premium version of Sleep Ledger? The premium version unlocks advanced features such as 14-day debt trend charts, a detailed day-by-day recovery plan with a target zero-debt date, quality-weighted debt scoring using sleep stages and HRV, and sleep stage breakdown charts. ### How often is Sleep Ledger updated? Sleep Ledger was last updated on May 26, 2026, with version 1.10.1. This indicates a recent update, suggesting ongoing development and support for the application. ### What devices does Sleep Ledger support? Sleep Ledger is available for iPhone and Apple Watch. The app is designed to leverage the capabilities of both devices for a comprehensive sleep tracking and analysis experience. ## Version history (last 5 releases) ### 1.12.1 — 2026-09-04 What's New in v1.12.1 — How Did You Sleep? NEW - Morning Check-In: rate how your sleep felt — quality, restedness, and energy — in three taps, about ten seconds. Entirely optional: turn it on from the one-time intro or anytime in Settings. Past entries are always visible in History. - "How mornings felt" in your weekly summary. It also points out when the numbers and your mornings disagree — like debt going down before you feel the difference. Only an app with both Apple Health data and your check-ins can say that. - 7-day view in History — a better fit for your first weeks and for spotting short-term patterns. IMPROVED - Faster app start: your dashboard now appears right away, and the AI morning insight fills in a moment later. - The AI morning insight now considers your check-in, so its advice reflects how you actually feel — not just what the sensors say. Questions or ideas? Settings → Contact reaches us directly. ### 1.12 — 2026-08-26 What's New in v1.12 — How Did You Sleep? NEW - Morning Check-In: rate how your sleep felt — quality, restedness, and energy — in three taps, about ten seconds. Entirely optional: turn it on from the one-time intro or anytime in Settings. - "How mornings felt" in your weekly summary. It also points out when the numbers and your mornings disagree — like debt going down before you feel the difference. Only an app with both Apple Health data and your check-ins can say that. - 7-day view in History — a better fit for your first weeks and for spotting short-term patterns. IMPROVED - The AI morning insight now considers your check-in, so its advice reflects how you actually feel — not just what the sensors say. Questions or ideas? Settings → Contact reaches us directly. ### 1.11.2 — 2026-08-10 What's New in v1.11.2 — A Clearer Path Through Your Free Trial NEW - See exactly how your free trial works: a step-by-step timeline on the paywall, "no charge today" reassurance, and a reminder before the trial ends. - Canceled or expired subscriptions now take effect in the app immediately — no relaunch needed. IMPROVED - Your weekly summary now includes manual sleep entries and naps, so it always matches your dashboard. - The recovery plan counts your manual corrections too — one consistent debt balance everywhere. - Speaking your language: durations, Siri's last-night summary, and subscription details are now properly localized in Japanese, German, French, and Korean. - History opens faster, and heart-rate & HRV details load sooner. FIXED - Sleep debt and recommended bedtime now agree on every screen. - The recovery projection no longer wiped your remaining debt in rare configurations. - Apple Watch sync is sturdier and safely ignores malformed data. Questions or ideas? Settings → Contact reaches us directly. ### 1.11.1 — 2026-06-22 What's New in v1.11.1 — Your Corrections Count FIXED - Manual sleep entries now take priority. When you add a manual entry for a night that already has Apple Health or AutoSleep data, your correction replaces the automatic data everywhere — your sleep debt, the recovery plan, and CSV export. Until now it only updated the History view, while the original data still counted toward your debt and appeared in exports. - This is especially helpful on nights without Apple Watch, where automatic tracking can be incomplete — your manual entry now gives a more accurate debt balance. Thank you for the feedback that led to this fix. Settings → Contact is the fastest way to reach us. ### 1.11 — 2026-06-10 What's New in v1.11 — Look back, celebrate, recover WEEKLY RECAP - A new Weekly Summary notification opens a one-screen recap of last week — average sleep, debt change, goal-hit nights, total naps, your best and hardest night, and a day-by-day chart with your sleep target. - Toggle it under Settings → Notifications, or open the recap any time from the Dashboard toolbar. MILESTONE CELEBRATIONS - Clear your sleep debt, or hit your goal three or seven nights in a row, and SleepLedger marks it with a one-shot notification and a brief in-app celebration. - Quiet for the first two weeks after install, so partial early data never triggers a false win. TRIAL HEADS-UP - On the free annual trial? You'll get a single, gentle local reminder three days before it ends, at 8 PM — no surprise charges. SETUP GUIDES - Step-by-step guides walk you through adding the Medium home screen widget and the Apple Watch complication. Find them under Settings → Help. UNDER THE HOOD - Modernized concurrency around notifications and StoreKit for a smoother, more reliable experience. Thanks for sleeping with SleepLedger. Settings → Contact is the fastest way to reach us. ## More apps by Takumi Kanzaki - [Kids Daily Checklist & Routine](https://appshunter.io/ios/app/kids-daily-checklist-and-routine/id6747349548) - [おじいちゃんといぬ](https://appshunter.io/ios/app/id6747392810) - [ChoresLogs&Allowance](https://appshunter.io/ios/app/choreslogs-and-allowance/id6747800793) - [StrideMap: Step & Mile Tracker](https://appshunter.io/ios/app/stridemap-step-and-mile-tracker/id6748224869) - [Lab Gone Wrong](https://appshunter.io/ios/app/lab-gone-wrong/id6748272674) - [DepthDrift - Idle Cave RPG](https://appshunter.io/ios/app/depthdrift-idle-cave-rpg/id6748545569) All apps by Takumi Kanzaki: https://appshunter.io/developer/1820952468 ## Related topics [sleep debt](https://appshunter.io/ios/topics/sleep-debt) · [takumi kanzaki](https://appshunter.io/ios/topics/takumi-kanzaki) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-05.*